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/*
* Copyright (C) 2008 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef StructureStubInfo_h
#define StructureStubInfo_h
#if ENABLE(JIT)
#include "Instruction.h"
#include "MacroAssembler.h"
#include "Opcode.h"
#include "Structure.h"
namespace JSC {
enum AccessType {
access_get_by_id_self,
access_get_by_id_proto,
access_get_by_id_chain,
access_get_by_id_self_list,
access_get_by_id_proto_list,
access_put_by_id_transition,
access_put_by_id_replace,
access_unset,
access_get_by_id_generic,
access_put_by_id_generic,
access_get_array_length,
access_get_string_length,
};
struct StructureStubInfo {
StructureStubInfo()
: accessType(access_unset)
, seen(false)
{
}
void initGetByIdSelf(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure)
{
accessType = access_get_by_id_self;
u.getByIdSelf.baseObjectStructure.set(globalData, owner, baseObjectStructure);
}
void initGetByIdProto(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, Structure* prototypeStructure)
{
accessType = access_get_by_id_proto;
u.getByIdProto.baseObjectStructure.set(globalData, owner, baseObjectStructure);
u.getByIdProto.prototypeStructure.set(globalData, owner, prototypeStructure);
}
void initGetByIdChain(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure, StructureChain* chain)
{
accessType = access_get_by_id_chain;
u.getByIdChain.baseObjectStructure.set(globalData, owner, baseObjectStructure);
u.getByIdChain.chain.set(globalData, owner, chain);
}
void initGetByIdSelfList(PolymorphicAccessStructureList* structureList, int listSize)
{
accessType = access_get_by_id_self_list;
u.getByIdProtoList.structureList = structureList;
u.getByIdProtoList.listSize = listSize;
}
void initGetByIdProtoList(PolymorphicAccessStructureList* structureList, int listSize)
{
accessType = access_get_by_id_proto_list;
u.getByIdProtoList.structureList = structureList;
u.getByIdProtoList.listSize = listSize;
}
// PutById*
void initPutByIdTransition(JSGlobalData& globalData, JSCell* owner, Structure* previousStructure, Structure* structure, StructureChain* chain)
{
accessType = access_put_by_id_transition;
u.putByIdTransition.previousStructure.set(globalData, owner, previousStructure);
u.putByIdTransition.structure.set(globalData, owner, structure);
u.putByIdTransition.chain.set(globalData, owner, chain);
}
void initPutByIdReplace(JSGlobalData& globalData, JSCell* owner, Structure* baseObjectStructure)
{
accessType = access_put_by_id_replace;
u.putByIdReplace.baseObjectStructure.set(globalData, owner, baseObjectStructure);
}
void deref();
void visitAggregate(SlotVisitor&);
bool seenOnce()
{
return seen;
}
void setSeen()
{
seen = true;
}
signed accessType : 31;
unsigned seen : 1;
union {
struct {
intptr_t deltaCheckToCall;
intptr_t deltaCallToLoad;
} unset;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
} getByIdSelf;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
WriteBarrierBase<Structure> prototypeStructure;
} getByIdProto;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
WriteBarrierBase<StructureChain> chain;
} getByIdChain;
struct {
PolymorphicAccessStructureList* structureList;
int listSize;
} getByIdSelfList;
struct {
PolymorphicAccessStructureList* structureList;
int listSize;
} getByIdProtoList;
struct {
WriteBarrierBase<Structure> previousStructure;
WriteBarrierBase<Structure> structure;
WriteBarrierBase<StructureChain> chain;
} putByIdTransition;
struct {
WriteBarrierBase<Structure> baseObjectStructure;
} putByIdReplace;
} u;
CodeLocationLabel stubRoutine;
CodeLocationCall callReturnLocation;
CodeLocationLabel hotPathBegin;
};
} // namespace JSC
#endif
#endif // StructureStubInfo_h